added queue for loading and offline storage of parsed info

fpjs/reader/app.js

@@ -11,16 +11,6 @@ FP.app.init = (function($){
 	//-- Setup the browser prefixes 
 	FP.core.crossBrowserColumnCss();
 
-	//-- Temp set the previos position to section 6, 
-	//   since moby-dick has lots of crap before the test
-	//   Might want to make a way to skip to first chapter
-	if (localStorage.getItem("bookURL") === null || 
-		localStorage.getItem("bookURL") != bookURL) {
-
-		localStorage.setItem("bookURL", bookURL);
-		localStorage.setItem("spinePos", 0);
-	}
-
 	//-- Set up our sidebar
 	$("#main").width($(window).width()-40);
 
@@ -150,6 +140,6 @@ FP.app.init = (function($){
 
   }
 
-  return init;
+  return  init;
 
 })(jQuery);

fpjs/render/book.js

@@ -17,11 +17,13 @@ FP.Book = function(elem, bookUrl){
 	this.createEvent("book:resized");
 
 	this.initialize(this.el);
+	
+	this.online = navigator.onLine;
 	this.listeners();
 	
 	//-- Determine storage type
 	//   options: none | ram
-	FP.storage.storageMethod("none");
+	FP.storage.storageMethod("ram");
 	
 	// BookUrl is optional, but if present start loading process
 	if(bookUrl) {
@@ -31,24 +33,31 @@ FP.Book = function(elem, bookUrl){
 
 }
 
+
 //-- Build up any html needed
 FP.Book.prototype.initialize = function(el){
 	this.iframe = document.createElement('iframe');
 	this.resizeIframe(false, this.el.clientWidth, this.el.clientHeight);
 
 	this.listen("book:resized", this.resizeIframe, this);
-
-	//this.listen("book:bookReady", function(){console.log("rready")});
-
-
+	
 	this.el.appendChild(this.iframe);
-
-
+	
 }
 
 FP.Book.prototype.listeners = function(){
 	var that = this;
 	window.addEventListener("resize", that.onResized.bind(this), false);
+	
+	window.addEventListener("offline", function(e) {
+	  that.online = false;
+	}, false);
+	
+	window.addEventListener("online", function(e) {
+	  that.online = true;
+	}, false);
+	
+	//-- TODO: listener for offline
 }
 
 
@@ -58,18 +67,61 @@ FP.Book.prototype.loadEpub = function(bookUrl){
 	//-- TODO: Check what storage types are available
 	//-- TODO: Checks if the url is a zip file and unpack
 	if(this.isContained(bookUrl)){
-		console.log("Zipped!");
+		console.error("Zipped!");
+	}
+	
+	if(!this.isSaved()){
+		//-- Gets the root of the book and url of the opf
+		this.parseContainer(function(){
+			//-- Gets all setup of the book from xml file
+			//-- TODO: add promise for this instead of callback?
+			this.parseContents();
+		});
+
+	}else{
+		this.tell("book:tocReady");
+		this.tell("book:metadataReady");
+		this.tell("book:spineReady");
+		console.log(this.metadata)
+		//-- Info is saved, start display
+		this.startDisplay();
 	}
 
-	//-- Gets the root of the book and url of the opf
-	this.parseContainer(function(){
-		//-- Gets all setup of the book from xml file
-		//-- TODO: add promise for this instead of callback?
-		this.parseContents();
-	});
+}
 
+FP.Book.prototype.isSaved = function(force) {
 
+	if (localStorage.getItem("bookUrl") === null || 
+		localStorage.getItem("bookUrl") != this.bookUrl ||
+		force == true) {
 
+		localStorage.setItem("bookUrl", this.bookUrl);
+		localStorage.setItem("spinePos", 0);
+		localStorage.setItem("stored", 0);
+		
+		this.spinePos = 0;
+		this.stored = 0;
+		
+		return false;
+	}else{
+		//-- get previous saved positions
+		this.spinePos = parseInt(localStorage.getItem("spinePos")) || 0;
+		this.stored = parseInt(localStorage.getItem("stored")) || 0;
+		
+		//-- get previous saved paths
+		this.basePath = localStorage.getItem("basePath");
+		this.contentsPath = localStorage.getItem("contentsPath");
+		
+		//-- get previous saved content
+		this.metadata = JSON.parse(localStorage.getItem("metadata"));
+		this.assets = JSON.parse(localStorage.getItem("assets"));
+		this.spine = JSON.parse(localStorage.getItem("spine"));
+		this.toc = JSON.parse(localStorage.getItem("toc"));
+
+		return true;
+	}
+
+	
 }
 
 FP.Book.prototype.isContained = function(bookUrl){
@@ -128,6 +180,10 @@ FP.Book.prototype.parseContainer = function(callback){
 
 		that.basePath = that.bookUrl + fullpath[0] + "/";
 		that.contentsPath = fullpath[1];
+		
+		localStorage.setItem("basePath", that.basePath);
+		localStorage.setItem("contentsPath", that.contentsPath);
+		
 		//-- Now that we have the path we can parse the contents
 		//-- TODO: move this
 		that.parseContents(that.contentsPath);
@@ -143,6 +199,7 @@ FP.Book.prototype.parseContents = function(){
 		var metadata = contents.getElementsByTagName("metadata")[0],
 			manifest = contents.getElementsByTagName("manifest")[0],
 			spine = contents.getElementsByTagName("spine")[0];
+			
 		that.parseMetadata(metadata);
 		that.parseManifest(manifest);
 		that.parseSpine(spine);
@@ -160,7 +217,9 @@ FP.Book.prototype.parseMetadata = function(metadata){
 
 	this.metadata["bookTitle"] = title ? title.childNodes[0].nodeValue : "";
 	this.metadata["creator"] = creator ? creator.childNodes[0].nodeValue : "";
-
+	
+	localStorage.setItem("metadata", JSON.stringify(this.metadata));
+	
 	this.tell("book:metadataReady");
 }
 
@@ -181,6 +240,8 @@ FP.Book.prototype.parseManifest = function(manifest){
 			that.parseTOC(href);
 		}
 	});
+	
+	localStorage.setItem("assets", JSON.stringify(this.assets));
 }
 
 FP.Book.prototype.parseSpine = function(spine){
@@ -201,6 +262,9 @@ FP.Book.prototype.parseSpine = function(spine){
 		that.spine.push({"id": id, "href": href});
 		that.spineIndex[id] = index;
 	});
+	
+	localStorage.setItem("spine", JSON.stringify(this.spine));
+	
 	this.tell("book:spineReady");
 }
 
@@ -252,7 +316,8 @@ FP.Book.prototype.parseTOC = function(path){
 		}
 
 		that.toc = getTOC(navMap.getElementsByTagName("navPoint"), navMap);
-
+		
+		localStorage.setItem("toc", JSON.stringify(that.toc));
 
 		that.tell("book:tocReady");
 		/*
@@ -283,16 +348,22 @@ FP.Book.prototype.chapterTitle = function(){
 }
 
 FP.Book.prototype.startDisplay = function(){
-	//-- get previous saved positions
-	var spinePos = parseInt(localStorage.getItem("spinePos")) || 0;
-
+	
+	
 	this.tell("book:bookReady");
-
-	this.displayChapter(spinePos);
+	this.displayChapter(this.spinePos, false, function(){
+		
+		//-- What happens if the cache expires / is cleared / changed?
+		//if(!this.stored){
+			this.storeOffline();
+		//}
+		
+	}.bind(this));
+	
 
 }
 
-FP.Book.prototype.displayChapter = function(pos, end){
+FP.Book.prototype.displayChapter = function(pos, end, callback){
 	var that = this;
 
 	if(pos >= this.spine.length){
@@ -321,7 +392,12 @@ FP.Book.prototype.displayChapter = function(pos, end){
 
 		that.tell("book:chapterReady");
 		
-		that.preloadNextChapter();
+		if(callback){
+			callback();
+		}
+		//that.preloadNextChapter();
+		
+		
 	}
 }
 
@@ -365,10 +441,15 @@ FP.Book.prototype.preloadNextChapter = function(){
 	file = FP.storage.preload(path);
 }
 
-FP.Book.prototype.preloadAll = function(){
-	
+FP.Book.prototype.storeOffline = function(callback){
+	var assets = FP.core.toArray(this.assets);
+	FP.storage.batch(assets, function(){
+		this.stored = 1;
+		localStorage.setItem("stored", 1);
+		if(callback) callback();
+	}.bind(this));
 }
 
-FP.Book.prototype.preloadResources = function(){
-
+FP.Book.prototype.availableOffline = function(){
+	return this.stored > 0 ? true : false;
 }

fpjs/render/chapter.js

@@ -9,24 +9,34 @@ FP.Chapter = function(book){
 	this.chapterPos = 1;
 	this.leftPos = 0;
 
-	this.loadFromStorage();
+	this.load();
 	
 	return this;
 
 }
 
-FP.Chapter.prototype.loadFromStorage = function(){
-	var path = this.path,
-		file = FP.storage.get(path, this.postLoad.bind(this));
+FP.Chapter.prototype.load = function(){
+	var path = this.path;
+
+	if(this.book.online){
+		this.setIframeSrc(path);
+	}else{
+		this.loadFromStorage(path);
+	}
+	
 }
 
-FP.Chapter.prototype.postLoad = function(file){
+FP.Chapter.prototype.loadFromStorage = function(path){
+	var file = FP.storage.get(path, this.setIframeSrc.bind(this));
+}
+
+FP.Chapter.prototype.setIframeSrc = function(url){
 	var that = this;
 	
 	//-- Not sure if this is the best time to do this, but hide current text
 	if(this.bodyEl) this.bodyEl.style.visibility = "hidden";
 	
-	this.iframe.src = file;
+	this.iframe.src = url;
 	
 	this.iframe.onload = function() {
 		//that.bodyEl = that.iframe.contentDocument.documentElement.getElementsByTagName('body')[0];

fpjs/render/core.js

@@ -121,3 +121,18 @@ FP.core.crossBrowserColumnCss = function(){
 	// FP.core.columnWidth =  cssIfy(FP.core.columnWidth);
 
 }
+
+FP.core.toArray = function(obj) {
+  var arr = [];
+
+  for (member in obj) {
+	var newitm;
+	if ( obj.hasOwnProperty(member) ) {
+	  newitm = obj[member];
+	  newitm.ident = member;
+	  arr.push(newitm);
+	}
+  }
+
+  return arr;
+};

fpjs/render/queue.js

@@ -0,0 +1,167 @@
+FP.Queue = function(worker, concurrency){
+	this._q = [];
+	this._tasks = {};
+	this.idCount = 0;
+	this.concurrency = 0;
+
+	this.workers = [];
+	this.available = [];
+	
+	if(typeof(worker) === "string") {
+		this.workerStr = worker;
+		this.addWorkers(concurrency || 1);
+	}
+	
+	if(typeof(worker) === "function") {
+		this.workerFunction = worker;
+		this.addFakeWorkers(concurrency || 1);
+	}
+	
+}
+
+FP.Queue.prototype.addWorkers = function(concurrency){
+	var min = this.concurrency,
+		max = min + concurrency;
+		
+	//-- Stop running jobs or something?
+	
+	for(var i=min; i < concurrency; i++){
+		var worker = new Worker(this.workerStr);
+		this.workers.push(worker); //-- Add new work
+		this.available.push(i);	//-- Make available to start tasks
+	}
+	
+	this.concurrency = concurrency;
+
+}
+
+FP.Queue.prototype.addFakeWorkers = function(concurrency){
+	var min = this.concurrency,
+		max = min + concurrency;
+
+	//-- Stop running jobs or something?
+
+	for(var i=min; i < concurrency; i++){
+		var worker = new FP.FakeWorker(this.workerFunction);
+		this.workers.push(worker); //-- Add new work
+		this.available.push(i);	//-- Make available to start tasks
+	}
+	
+	this.concurrency = concurrency;
+}
+
+FP.Queue.prototype.add = function(msg, callback, priority){
+	var ID = this.idCount;
+	//-- Add to task object : maybe check for dups
+	this._tasks[ID] = {
+		"msg": msg,
+		"callback": callback || function(){}
+	}
+	
+	//-- Add id to queue
+	if(!priority){
+		this._q.push(ID);
+	}else{
+		this._q.unshift(ID);
+		if(!this.running) this.run();
+	}
+	
+	//-- Increment ID for next task
+	this.idCount++;
+	
+	
+	
+	return ID;
+}
+
+FP.Queue.prototype.addGroup = function(group, callback){
+	var that = this,
+		counter = group.length,
+		after = function(){
+			counter--;
+			if(counter <= 0) callback();
+		};
+		
+	group.forEach(function(msg){
+		that.add(msg, after);
+	});
+
+	if(!this.running) this.run();
+	
+	return after;
+}
+
+FP.Queue.prototype.run = function(id){
+	if(this.running) return;
+	this.running = true;
+
+	while(this.available.length) {
+	  var next = this.next();
+	  if(!next) break; //-- no tasks left or error
+	}
+	
+}
+
+FP.Queue.prototype.find = function(msg){
+	
+}
+
+FP.Queue.prototype.next = function(){
+	var that = this,
+		curr = this._q.shift(),
+		task, 
+		workerID, 
+		worker;
+
+	if(typeof(curr) === "undefined"){
+		//-- Nothing left on queue
+		this.running = false;
+		return false; 
+	}
+	
+	task = this._tasks[curr];
+	workerID = this.available.pop();
+	worker = this.workers[workerID];
+	
+	//-- give worker new task
+	worker.postMessage(task.msg);
+	
+	//-- listen for worker response
+	worker.onmessage = function(e){
+		var data = e.data;
+
+		task.callback(data);
+		delete that._tasks[curr]; //-- Remove task
+		
+		that.available.push(workerID);
+		that.next();
+	}
+	
+	return worker;
+}
+
+FP.Queue.prototype.empty = function(){
+	this._q = [];
+	this._tasks = {};
+	//-- TODO: close workers
+}
+
+//-- A super simplistic fake worker, is passed a function instead of a script
+
+FP.FakeWorker = function(func){
+	this.func = func;
+}
+
+FP.FakeWorker.prototype.postMessage = function(msg){
+	setTimeout(function(){
+		this.func(msg, this.onmessage);
+	}.bind(this), 1);
+}
+
+FP.FakeWorker.prototype.onmessage = function(e){
+
+}
+
+FP.FakeWorker.prototype.close = function(e){
+
+}

fpjs/render/storage.js

@@ -16,6 +16,7 @@ FP.storage = function(){
 		
 		//-- Handle load errors
 		this._store.failed = _error;
+		
 	}
 	
 	function get(path, callback) {
@@ -26,6 +27,14 @@ FP.storage = function(){
 		return this._store.preload(path, callback);
 	}
 	
+	function batch(group, callback) {
+		return this._store.batch(group, callback);
+	}
+	
+	function replace(path, content, callback) {
+		//return this._store.batch(group, callback);
+	}
+	
 	function _error(err){
 		console.log("error", err);	
 	}
@@ -33,15 +42,18 @@ FP.storage = function(){
 	return {
 		"get" : get,
 		"preload" : preload,
+		"batch" : batch,
 		"storageMethod": storageMethod
 	}
 	
 }();
 
-
+/*
 FP.storage.ram = function() {
 	var _store = {},
-		_blobs = {};
+		_blobs = {},
+		_queue = new FP.Queue("loader_ram.js", 3);
+
 		
 	//-- TODO: this should be prototypes?
 	
@@ -53,6 +65,10 @@ FP.storage.ram = function() {
 			request(path);
 		}
 	}
+	
+	function batch(group, callback){
+		_queue.addGroup(group)
+	}
 
 	//-- Fetches url
 	function get(path, callback) {
@@ -148,6 +164,7 @@ FP.storage.ram = function() {
 		"preload" : preload
 	}	
 }
+*/
 
 FP.storage.none = function() {
 	var _store = {};
@@ -221,4 +238,133 @@ FP.storage.none = function() {
 		"get" : get,
 		"preload" : preload
 	}	
+}
+
+FP.storage.ram = function() {
+	var _store = {},
+		_blobs = {},
+		_queue = new FP.Queue(loader, 6); 
+		//-- max of 6 concurrent requests: http://www.browserscope.org/?category=network
+
+	
+	function loader(msg, callback){
+		var e = {"data":null},
+			fromCache = check(msg);
+		
+		if(fromCache){
+			e.data = fromCache;
+			callback(e);
+		}else{
+			request(msg, function(file){
+				e.data = file;
+				callback(e);
+			});
+		}
+	}
+	
+	function preload(path) {
+		var fromCache = check(path);
+
+		if(!fromCache){
+			_queue.add(path);
+		}
+	}
+
+	function batch(group, callback){
+		_queue.addGroup(group, callback);
+	}
+
+	//-- Fetches url
+	function get(path, callback) {
+		var fromCache = check(path),
+			url;
+
+		if(fromCache){
+			url = getURL(path, fromCache);
+			if(typeof(callback) != "undefined"){
+				callback(url);
+			}
+		}else{
+			_queue.add(path, function(file){
+				url = getURL(path, file);
+				if(typeof(callback) != "undefined"){
+					callback(url);
+				}
+			}, true);
+		}
+
+	}
+
+	function check(path) {
+		var file = _store[path];
+
+		if(typeof(file) != "undefined"){
+			return file;
+		}
+
+		return false;
+	}
+
+	function request(path, callback) {
+		var xhr = new FP.core.loadFile(path);
+
+		xhr.succeeded = function(file) {
+			//console.log("file", file)
+			cache(path, file);
+			if(typeof(callback) != "undefined"){
+				callback(file);
+			}
+		}
+
+		xhr.failed = _error;
+
+		xhr.start();
+	}
+
+	function cache(path, file) {
+		if(_store[path]) return;
+
+		_store[path] = file;
+	}
+
+	function getURL(path, file){
+		var url;
+
+		if(typeof(_blobs[path]) != "undefined"){
+			return _blobs[path];
+		}
+
+		url = this._URL.createObjectURL(file);
+
+		//-- need to revokeObjectURL previous urls, but only when cleaning cache
+		// this.createdURLs.forEach(function(url){
+		// 	this._URL.revokeObjectURL(url);
+		// });
+
+		_blobs[path] = url;
+
+		return url;
+	}
+
+	// this.succeeded = function(){
+	// 	console.log("loaded");	
+	// }
+	// 
+	// this.failed = function(){
+	// 	console.log("loaded");	
+	// }
+
+	function _error(err){
+		if(typeof(this.failed) == "undefined"){
+			console.log("Error: ", err);
+		}else{
+			this.failed(err);
+		}
+	}
+
+	return {
+		"get" : get,
+		"preload" : preload,
+		"batch" : batch
+	}	
 }

index.html

@@ -10,7 +10,8 @@
 
         <link rel="stylesheet" href="css/normalize.css">
         <link rel="stylesheet" href="css/main.css">
-        <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script>
+        <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.0/jquery.min.js"></script>
+        <script>window.jQuery || document.write('<script src="fpjs/libs/jquery-1.9.0.min.js"><\/script>')</script>
         <script src="fpjs/libs/modernizr-2.6.2.min.js"></script>
         <script>
             //-- Define Global   
@@ -35,6 +36,7 @@
         
         
         <script async src="fpjs/render/core.js"></script>
+        <script async src="fpjs/render/queue.js"></script>
         <script async src="fpjs/render/storage.js"></script>
         <script async src="fpjs/render/events.js"></script>
         <script async src="fpjs/render/book.js"></script>